Nitrogen-fixing Bacteria and Non-leguminous Plants

[Root nodule bacteria on leguminous plants].

Ferredoxins from Nitrogen-Fixing Bacteria

Two ferredoxins have been purified from N2-fixing Mycobacterium flavum. Ferredoxin I had a minimum molecular weight (by amino acid analysis) of 11 230 and contained 7.4 mol Fe and 7.0 mol S2per mol. The ratio of the absorbance at 400 nm to that at 275 nm was 0.7. Ferredoxin I1 had a minimum molecular weight of 13478 and contained 3.4 mol Fe and 3.2 mol S2per mol. The ratio of the absorbance at ...

Studies of aerobic non-symbiotic nitrogen-fixing bacteria.

The occurrence of aerobic, non-symbiotic, nitroqen-fixing bacteria was determined in samples of soil collecte~l in the various soil zones of Allxrm and Saslcatchewan. Mannitol and sodiuttl betuoate dust-platrs. and mallnit01 solution cultures wiLh subsequent inoculation onto rnannitol agar demonstrated that Asolohnrtt-r were not wirlcspreatl in the Canadian prairie province soils. These r)n)ccr...

On Photosynthesis and Free Nitrogen Assimilation by Leguminous Plants.

Nitrogen-Fixing Bacteria in Eucalyptus globulus Plantations

Eucalypt cultivation is an important economic activity worldwide. In Portugal, Eucalyptus globulus plantations account for one-third of the total forested area. The nutritional requirements of this crop have been well studied, and nitrogen (N) is one of the most important elements required for vegetal growth. N dynamics in soils are influenced by microorganisms, such as diazotrophic bacteria (D...